Definition 6.35  (See [1]}.) 
 Referring to Notation REF ,
define
\(b_i &= \frac{ \text{\rm tr}(E^*_i A E^*_{i+1} E_0) }{\text{\rm tr}(E^*_i E_0) } && (0 \le i \le d-1),\\c_i &= \frac{ \text{\rm tr}(E^*_i A E^*_{i-1} E_0) }{\text{\rm tr}(E^*_i E_0) } && (1 \le i \le d).\) 

